If you haven't guessed by now this unit is an 800 watt model. This much power should be enough to power a decent multi-GPU rig. The PP800 has the greatest amount of power output in Performance Power as the other models are 500 and 600 watts. Like most power supplies today the PP800 boast four 12 volt rails totaling up to 78 amps. A lot of power, a lot of ampere and an SLI certification is enough to warrant a good run on the old test bench.